Gifted by friends, you can buy them to give you Exp As well (planted gifted trees does not yield Exp). You can harvest them then for extra money to add to your profits, or you can let them ripen and leave them to make your farm look pretty (What I do).
They are slow by steady income, but can take up lots of space normally along the edge of your farm, or bunched in one corner.
Alternatively you can (Similarly to the plots) buy them for the Exp, sell them, and buy more!
Name – Buying Price – Exp Gained from Planting – Harvest in – Produce Selling price – Tree Selling Price
Acai – 27 farmcash – 2 Days – 158 coins – 47 coins
Cherry – 225 coins – 5Exp– 2 Days – 18 coins – 11 coins
Apple – 325 coins – 5Exp - 3 Days – 28 coins – 16 coins
Orange – 425 coins – 5Exp - 4 Days – 40 coins – 21 coins
Plum – 350 coins – 5Exp - 3 Days – 30 profit – 17 coins
Peach - 500 coins – 5Exp - 4 Days – 47 coins – 25 coins
Lemon - 475 coins – 5Exp - 3 Days – 41 coins – 23 coins
Lime – 750 coins – 7Exp - 5 Days – 75 coins – 37 coins
Fig - Only Gift – Gifted - 3 Days – 33 coins – 18 coins
Avocado – Only Gift – Gifted -3 Days – 37 coins – 21 coins
Apricot – Only Gift – Gifted -4 Days – 56 coins – 30 coins
Grapefruit – Only Gift – Gifted -3 Days – 50 coins – 23 coins
Banana -Only Gift – Gifted - 3 Days – 56 coins – 32 coins
Passion Fruit – Only Gift – Gifted - 5 Days – 93 coins – 46 coins
Pomegranate – Only Gift – Gifted - 5 Days – 108 coins – 53 coins
Date – Only Gift – Gifted - 3 Days – 69 coins – 40 coins
Olive - Only Gift – Gifted - 4 Days – 90 coins – Unknown